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14 <br />• origin located in this project included structural remains, and are thus <br />easily separated from aboriginal sites. <br />Prehistoric period sites can be further broken down according to <br />the types of activities represented. The two most corrunon types are lithic <br />sites and habitation or campsites. Lithic sites are commonly unsheltered <br />and consist primarily of debris resulting from the manufacture of stone <br />tools. This debris can include cores, decortication flakes, non-cortical <br />flakes, retouch flakes, manufacturing tools such as hammerstones, and the <br />tools made at the site. Hence, a lithic site is composed of manu- <br />facturing debris and tools in various states of manufacture, including <br />partially completed and fragmented tools. Sites containing permanent <br />features or tools associated with domestic activities are not classified <br />as lithic sites. <br />Campsites, or habitations, may include the same kind of materials as <br />in lithic sites, with the addition of domestic artifacts. Also, habita- <br />tions may include architectural remains such as tipi rings, standing <br />structures, or simply firepits. <br />Other evidence leading to the designation as a habitation consists <br />of surface or subsurface permanent features. These include such <br />things as burned or discolored earth, charcoal stain or fragments in a <br />specific and limited area, bedrock mortars, charred or fragmented bone, <br />and other food waste. The presence of these kinds of features, in associa- <br />tion with domestic tools such as manos, metates, choppers, other food <br />processing tools, and pottery, indicate a different and more generalized <br />pattern of behavior or activity than do lithic site materials. <br />Since very few hearths were discovered in the survey, most of the <br />open camps were defined by the presence of ground stone tools. The <br />